if langserver can generate the function signature anonations for us

[haolian9]

Hi folks!
It is often boring and inefficient to write signature anonations for functions from scratch, since language server already knew the signature infomation about a function, and it uses a dedicated anonation flavor, it must be capable to generate these anonations for us.
But the problem is there is no such method in the LSP spec, at least i failed to find one.

In practical, lua-language-server's textDocument/hover gives function foo(a: any, b: any) -> number for this code.

local function foo(a, b)
  return a + b
end

(If this feature can not be provided on the langserver side, i think i can make a plugin for nvim, and actually i am just about to do it)

[haolian9]

i just realized treesitter can also be usd for this purpose. and it'd be much easier to implement since i can access the AST rather than parsing the response of textDocument/hover.

---

there is one already: https://github.com/danymat/neogen

[sewbacca]

There is also the --- snippet:

[haolian9]

thanks! good to know that, it's a pity that i have never enabled this snippet feature.
anyway, i'm quite happy with the treesitter approach so far, I can easily add more language supports on nvim side without complicating the language servers, though it's not as perfect as lang server provided.